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Cobra Forums
The Terminator
Suspension Modifications
specific vibration @ 60-65 mph coast and acceleration
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<blockquote data-quote="bubblehead93" data-source="post: 15270310" data-attributes="member: 96609"><p>sometimes specific speeds match specific frequencies which cause a resonate type effect... for the speed at which it occurs... what gear are you in... does it occur at the same speed in a different gear, or does the speed change... if it is always the same speed regardless of gear, then it is from the driveshaft back... ford had a problem with bad driveshafts from the factory (just slightly out of balance or round, just enough to be ok until you got to this resonance frequency)... had a tsb on it (had mine replaced due to a similar problem, it would vibrate at a certain speed, then get better), also, on some cars, indexing the driveshaft makes a difference... has the driveshaft been out of the car recently... I would start with the driveshaft...</p><p></p><p>r/</p><p>Andy</p></blockquote><p></p>
[QUOTE="bubblehead93, post: 15270310, member: 96609"] sometimes specific speeds match specific frequencies which cause a resonate type effect... for the speed at which it occurs... what gear are you in... does it occur at the same speed in a different gear, or does the speed change... if it is always the same speed regardless of gear, then it is from the driveshaft back... ford had a problem with bad driveshafts from the factory (just slightly out of balance or round, just enough to be ok until you got to this resonance frequency)... had a tsb on it (had mine replaced due to a similar problem, it would vibrate at a certain speed, then get better), also, on some cars, indexing the driveshaft makes a difference... has the driveshaft been out of the car recently... I would start with the driveshaft... r/ Andy [/QUOTE]
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The Terminator
Suspension Modifications
specific vibration @ 60-65 mph coast and acceleration
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